Answer:
Mitosis
Step-by-step explanation:
The reason why mitosis occurs most often is due to the need for the replacement of cells. When cells die, there needs to be replacements made. Mitosis is the division of cells, which allows for these new cells to be created. Mitosis happens throughout an organisms lifespan, and is most abundent throughout the organism's rapid periods of growth.
Hope this helps!
Panna